On April 30, 1980, six heavily armed gunmen burst into the Iranian embassy on Princes Gate, overlooking Hyde Park in London. There they took 26 hostages, including embassy staff, visitors, and three British citizens.

A tense six-day siege ensued as millions gathered around screens across the country to witness the longest news flash in British television history, in which police negotiators and psychiatrists sought a bloodless end to the standoff, while the SAS – hitherto an organisation shrouded in secrecy – laid plans for a daring rescue mission: Operation Nimrod.

Tony Hoare always knew he wanted to be in the SAS.

Both his grandfather and father had been soldiers, and so Tony signed up for the Cadets at 13, then the Infantry at 17 and enlisted into the Royal Green Jackets before passing arduous SAS selection in 1978.

Less than four years later, Tony and his team were sent to a collection of islands just off the coast of Argentina called the Falklands, where tensions were rising and war was on the horizon.

There were three patrols that fateful January 1991 morning: Bravo One Zero, Bravo Two Zero and Bravo Three Zero. It was the opening hours of the Gulf War and the SAS were flown deep behind enemy lines to hunt down Saddam''s Scud missiles, the use of which threatened a Third World War.

The men of Bravo One Zero stepped off the chopper, took one look at the flat desert devoid of any cover and decided no way were they deploying into all of that. But Andy NcNab''s famed Bravo Two Zero patrol did deploy, with fatal results - all bar one being captured or killed.